diff --git a/README.md b/README.md
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--- a/README.md
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@@ -1,3 +1,7 @@
 # forex
 
-a CLI currency converter, written in rust
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+a CLI currency converter, written in rust
+
+you need a [exchange rate api account](https://www.exchangerate-api.com/). currently its hard coded, idk if ill ever add support for other apis
+
+then supply the required arguments